Touch screen is a new type of programmable control terminal. It is a new generation of high-tech human-machine interface products. It is suitable for on-site control, with high reliability, simple programming and convenient use and maintenance. The use of a touch screen when there are many process parameters and human-computer interaction is required, the function of the automatic control of the whole production can be greatly enhanced.
The touch screen screen is designed by special software such as ProTool (Siemens) and CX-Designer (Omron), and then debugged by programming computer first, and then downloaded to the touch screen after correct. The total number of touch screen screens should be within the allowable range of their storage space, and each screen should be able to switch to each other as much as possible.
(1) Design of the main screen In general, the main screen of the welcome screen or the controlled system can be used as the main screen, and the screen can enter each sub-screen. Each sub-picture can return to the main screen in one step. If the main control system screen is used as the main screen, some main parameters of the controlled system should be displayed on the screen, so that the entire controlled system has a rough conclusion on this screen.
(2) Control screen design This screen is mainly used to control the start and stop of the controlled device and display the parameters inside the plc, and also set the PLC parameter settings. The number of such pictures occupies the most in the touch screen picture, and the specific number of pictures is determined by the actual controlled device.
(3) Design of the parameter setting page This screen mainly sets the internal parameters of the PLC, and also shows the completion of the parameter setting. In actual production, the encryption problem should also be considered, and the idle personnel should be allowed to arbitrarily change the parameters, causing unnecessary losses to the production.
(4) Design of real-time trend page This screen mainly displays the real-time status of the main operating parameters (such as output inverter frequency and temperature trend value) of the controlled value and PLC analog quantity in the form of curve recording.
(5) Design of information record page This screen mainly records fault information such as equipment damage, overload, numerical over-range and system emergency stop. In addition, the screen can also record the start and stop operations of each device as a voucher.
(6) Design of energy-saving screen This screen mainly records and displays the accumulated power consumption of the inverter and the real-time power saving state, so as to show the user the benefits of frequency conversion energy saving, and can also be used to compare with other power saving measurements.
(7) Design of the operation status screen This screen is mainly a centralized display of various equipment operating states.
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